Calcidiol lactone

calcifediol lactone

25-Hydroxyvitamine D3 26,23-lactone

(5Z,7E)-3β,23,25-Trihydroxy-9,10-secocholesta-5,7,10(19)-trien-26-oic acid γ-lactone

(5Z,7E)-3β,23,25-Trihydroxy-9,10-secocholesta-5,7,10(19)-trien-26-oic acid 26,23-lactone